Orienting of attention in left unilateral neglect

被引:249
作者
Bartolomeo, P
Chokron, S
机构
[1] Ctr Paul Broca, INSERM Unit 324, F-75014 Paris, France
[2] Hop Henri Mondor, Dept Neurosci, F-94010 Creteil, France
[3] CNRS UMR 5105, Expt Psychol Lab, F-5105 Grenoble, France
[4] Fondat Ophtalmol Rothschild, Paris, France
关键词
spatial attention; exogenous orienting; endogenous orienting; unilateral neglect; brain damage;
D O I
10.1016/S0149-7634(01)00065-3
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
After right posterior brain damage, patients may ignore events occurring on their left, a condition known as unilateral neglect. Although deficits at different levels of impairment may be at work in different patients, the frequency and severity of attentional problems in neglect patients have been repeatedly underlined. Recent advances in the knowledge of the mechanisms of spatial attention in normals may help characterizing these deficits. The present review focuses on studies exploring several aspect of attentional processing in unilateral neglect, with particular reference to the dichotomy between 'exogenous', or stimulus-related, and 'endogenous', or strategy-driven, orienting of attention. A large amount of neuropsychological evidence suggests that a basic mechanism leading to left neglect behavior is an impaired exogenous orienting toward left-sided targets. In contrast, endogenous processes seem to be relatively preserved, if slowed, in left unilateral neglect. Other component deficits, such as a general slowing of the operations of spatial attention, might contribute to neglect behavior. These results are presented and discussed, and their implications for hemispheric specialization in attentional orienting and for the mechanisms of visual consciousness are explored. (C) 2002 Elsevier Science Ltd. All rights reserved.
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页码:217 / 234
页数:18
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